El Niño could delay persistent frost and hard freezes across Canada
Canada is experiencing a strong El Niño weather pattern that is expected to delay the arrival of the first autumn frosts. While the phenomenon generally leads to warmer temperatures, experts warn that gardeners should remain prepared for sudden cold snaps.
Why it matters
Understanding seasonal climate shifts is critical for agricultural planning and gardening, as frost can significantly impact crop yields and plant health.
Dennis Mersereau Digital Journalist, Weather Specialist Published on Sep. 25, 2026, 10:17 PM While the pattern favours a warmer autumn, never count out the cold across Canada
Canada will continue to feel the effects of a very strong El Niño for months to come. The pattern will hold significant sway over how quickly temperatures decline in the weeks ahead.
Autumn is a particularly dynamic season for gardeners as average temperatures gradually drop.
The big question, as always, is how long we can go before frosts and freezes nip the growing season in the bud, and how much of a role El Niño will play in the process.
DON’T MISS: Understanding Canada's 'frost zones,' and when that first frost may hit
Tracking the season’s first frost and freeze potential is critical information for planters across the spectrum.
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